A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the BGP Enabled ServiceS WG of the IETF.

Title : Preference-based EVPN DF Election
Authors : Jorge Rabadan
Senthil Sathappan
Tony Przygienda
Wen Lin
John Drake
Ali Sajassi
Satya Ranjan Mohanty
Filename : draft-ietf-bess-evpn-pref-df-03.txt
Pages : 15
Date : 2018-12-21
Abstract:
The Designated Forwarder (DF) in Ethernet Virtual Private Networks
(EVPN) is defined as the PE responsible for sending Broadcast,
Unknown unicast and Broadcast traffic (BUM) to a multi-homed
device/network in the case of an all-active multi-homing Ethernet
Segment (ES), or BUM and unicast in the case of single-active multi-
homing.
The DF is selected out of a candidate list of PEs that advertise the
same Ethernet Segment Identifier (ESI) to the EVPN network, according
to the Default DF Election algorithm.
While the Default Algorithm provides an efficient and automated way
of selecting the DF across different Ethernet Tags in the ES, there
are some use-cases where a more 'deterministic' and user-controlled
method is required. At the same time, Service Providers require an
easy way to force an on-demand DF switchover in order to carry out
some maintenance tasks on the existing DF or control whether a new
active PE can preempt the existing DF PE.
This document proposes an extension to the Default DF election
procedures so that the above requirements can be met.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bess-evpn-pref-df/
There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bess-evpn-pref-df-03https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-pref-df-03
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bess-evpn-pref-df-03
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